The ability to turn on and off email notifications is a feature in development. We don't yet have a completion date.
In the meantime, if you don't want to get the emails you can easily create a filter in your email to route order notifications or other emails straight into a separate folder. That way you can just log in to the system and get your orders when you need to and can ignore the incoming emails.
Here are some common email providers and how to create a filter: